Am 04.02.2018 um 22:00 schrieb Shane Clay via mailop:
Hi!
I’m curious what others are doing to reduce spam originating from
Office
365 or using Sharepoint sites to host documents?
I see spam from Office 365/Outlook, too, but here SPF protection jumps
in. I wonder why does Microsoft allow to send using mail addresses of
domains which they do not run the mx for?
NOQUEUE: reject: RCPT from ***.outbound.protection.outlook.com[]: 550
5.7.1 <*@*>: Recipient address rejected: Please see
http://www.openspf.net/*
trying to send a mail originating from one of the domains I host to my
mail server...
Regards,
Andreas
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